Dome¹

Drilling continues to intersect excellent grades and widths within and outside Resource pit shell²; Resource update on track for late 2026

9.09 gpt³ over 17.3m³ including 14.76 gpt over 7.8m, 3.86 gpt over 18.0m including 15.39 gpt over 2.6m, 13.49 gpt over 3.5m, 1.03 gpt over 17.8m, 4.89 gpt over 2.8m, 2.26 gpt over 4.2m; 5.04 gpt over 8.4m, 11.20 gpt over 3.0m; 0.79 gpt over 11.9m; 1.72 gpt over 7.0m, 0.76 gpt over 10.8m; 0.79 gpt over 6.0m, 3.26 gpt over 4.1m; 1.89 gpt over 12.1m; 1.48 gpt over 12.0m; 1.38 gpt over 17.0m; 1.61 gpt over 16.0m; 22.0 gpt over 1.0m; and 278.48 gpt over 1.1m

TVZ

New intersections indicate strong correlation of mineralized zones and grades with previously drilled holes as well as potential grade upside²: Samples shipped for Metallurgical testing; Initial National Instrument 43-101 (“NI 43-101”) Resource estimate expected before year end²

1210 Level: 5.13 gpt gpt over 18.2m; 7.04 gpt over 16.9m; 5.17 gpt over 21.0m; 5.73 gpt over 23.2m; 6.93gpt over 11.7m; 5.65 gpt over 30.5m; 9.05 gpt over 13.2m and; 4.40 gpt over 14.0m, including 7.03 gpt over 6.8m; 5.24 gpt over 12.9m; and 5.46 gpt over 12.5m; 4.59 gpt over 25.0m; 4.54 gpt over 18.4m
1680 Level: 4.51 gpt over 9.0 m; 4.30 gpt over 24.4m, including 5.73 gpt over 12.4m

Owl Creek

Continuation of positive drill results; Exploration ramp development underway to accelerate drilling along 1.5 km Hoyle Pond – Owl Creek Trend

7.09 gpt over 17.0m, including 23.12 gpt over 2.0; 6.35gpt over 9.4m, 2.69 gpt over 30.9m, including 9.31 gpt over 2.0m, 2.86 gpt over 17.4m and; 3.41 gpt over 17.0m, including 7.45 gpt over 3.1m; 5.73 gpt over 4.2m and 2.74 gpt over 30.4m; 4.72 gpt over 24.0m including 12.26 gpt over 6.8m; 4.86 gpt over 8.4m; and 19.35 gpt over 5.4m, including 270.0 gpt over 0.3m.

1. All assays are reported uncut.
2. Intervals are reported using core lengths only as true widths are not known at this time.
3. In this news release, “gpt” refers to grams per tonne, and “m” refer to metres.

TORONTO, Aug. 05, 2026 (GLOBE NEWSWIRE) -- Discovery Mining Ltd. (TSX: DSV, OTCQX: DSVSF) (“Discovery” or the “Company”) today reported results from ongoing exploration at the Company’s advanced stage growth projects, Dome, TVZ and Owl Creek. The results, which include assays from a combined total of 55 holes¹ (17,845.5 m) completed between Q4 2025 and Q2 2026, continued to expand mineralization, indicated excellent correlation of widths and grades to previous drilling and clearly demonstrated the upside that exists at all three projects.

Line to 3D Visuals: https://vrify.com/decks/23480?auth=829532ad-ef99-48f1-a3e6-b5e9667f5c44

Tony Makuch, Discovery’s CEO, commented: “The excellent drilling results we are announcing today are extremely encouraging as we work towards releasing NI 43-101 resource estimates at Dome and TVZ before the end of 2026, and further advancing Owl Creek. These are three critical growth projects that, collectively, could contribute between a quarter and half a million ounces of annual gold production. With an existing 11.0 million ounce Inferred Resource, we expect Dome to become our second large-scale, open-pit operation in Timmins, along with Pamour, where recent drill results confirmed a strike length extending more than 4.0 km, with the mineralization remaining open in multiple directions and at depth. TVZ and Owl Creek are part of the Hoyle Pond Complex and both will benefit from our recent acquisition of the Kidd Metallurgical Site, located contiguous to Hoyle Pond and Pamour. Our plan for the Met Site is to construct a new conventional gold circuit that will process material from Pamour, Hoyle Pond, Owl Creek and other potential new sources of production. We also plan to commence processing Borden material using one of the current flotation circuits, likely beginning early next year, and will convert another circuit to gold flotation for future processing of TVZ material, given the refractory nature of the mineralization.

“Looking at today’s results, drilling at Dome continued to intersect excellent grades and widths in the southwest, north and northeast portions of the project, including favourable results from drilling below the north wall of the current resource pit. At TVZ, additional high-grade intersections were reported from drilling on both the 1210 and 1680 levels, with the results demonstrating excellent correlation of mineralized zones and grades with previously drilled holes and also confirming the down plunge potential of the TVZ zone. We also have completed drilling to collect samples for metallurgical testing, with the results expected to be received later this year. Drilling at Owl Creek included additional positive results, with the Company having now commenced work on a 1.5 km underground drift from Hoyle Pond to Owl Creek. Development of the drift will support an acceleration of drilling for additional extensions at Owl Creek and the 750 Zone, and the evaluation of new targets, such as the historic 350 Zone, which is located 500 m to the east of the 750 Zone.”

Dome Mine Project

Drilling at Dome included a total of 23 holes (8,391 m) being completed (Figure 1), with 5 holes (451 m) being abandoned due to excessive deviation from the target.

Dome is among the largest historic gold producers in Canada, with total production of 16.7 million ounces from both underground and open pit sources between 1910 and 2017.

Geologically, the mine is located on the south limb of the Porcupine Syncline and is just north of the Destor Porcupine Fault, with mineralization in multiple zones extending from surface to a depth of approximately 1,600 m.

The current mineral resource at Dome includes 222.3 million tonnes with an average grade of 1.49 gpt for a total of 11.0 million ounces in the Inferred category. The resource assumes a large-scale, open-pit concept to expand the historic pit along strike and to depth.

The current drill program is being completed in preparation for a new mineral resource estimate and involves drilling in areas surrounding and below the historic pit. The work program also includes further evaluations of data and mineralization models to upgrade portions of the resource to the Indicated resource category, and to evaluate the potential for future underground mining at Dome.

The new drilling was focused on infilling gaps in information and confirmation of historic drill holes in the southwest, north and northeast portions of the property and continued to obtain highly encouraging results.

Drilling in the southwest portion of the property included nine holes (3,096 m) to evaluate mineralization near the limits of the current resource pit. and continued to indicate excellent grades and widths of mineralization at very shallow depths from surface. Significant results include: 1.89 gpt over 12.1m, in hole DOM26-033; 1.48 gpt over 12.0m, in DOM26-030; 1.38 gpt over 17.0m, in hole DOM26-034; 0.79 gpt over 11.9m, in hole DOM26-024; and 1.72 gpt over 7.0m, 0.76 gpt over 10.8m; 0.79 gpt over 6.0m and, 3.26 gpt over 4.1m, in hole DOM26-026 (Table 1).

Drilling in the north portion of the property included 8 holes (4,349 m) to evaluate the mineralization below the north wall of the resource pit and was also very successful. Significant results include 9.09 gpt over 17.3m including 14.76 gpt over 7.8m, 3.86 gpt over 18.0m including 15.39 gpt over 2.6m, 13.49 gpt over 3.5m in hole DOM26-050; 1.03 gpt over 17.8m, 4.89 gpt over 2.8m and, 2.26 gpt over 4.2m, in hole DOM26-006A; 1.61 gpt over 13.2m and 22.0 gpt over 1.0m in hole DOM26-011; 3.04 gpt over 2.0m in hole DOM26-015; 1.51 gpt over 3.8m in hole DOM26-016 and; 5.04 gpt over 8.4m, including 11.20 gpt over 3.0m, in hole DOM26-008.

Drilling to the northeast included one new hole (495 m) which tested near the northeast limit of the resource pit and intersected a quartz vein structure containing 278.48 gpt over 1.1m, including 951.0 gpt over 0.3m.

Drilling at the project is continuing with two drills, one located in the southwest portion of the historic open pit and the other on the north side. Work is also continuing to evaluate additional drill targets to the north, south and west sides of the pit. Considering results and progress to date, the project remains on track for the planned resource update in late 2026.

Table 1. Intercepts from New Drilling at Dome Project^1,2

Area	Hole ID	Total Hole Depth (m)	From	To	Core length	Au	Notes
Area	Hole ID	Total Hole Depth (m)	(m)	(m)	(m)	(g/t)	Notes
NE/Blueberry	DOM26-005	495.0	298.8	299.9	1.1	278.48	In Pit
			incl
			299.1	299.4	0.3	951.00
Tailings	DOM26-006A	522.0	328.2	346.0	17.8	1.03	Out
			353.0	355.8	2.8	4.89	Out
			456.5	466.7	10.2	0.67	Out
			471.7	473.5	1.8	4.38	Out
			479.0	483.2	4.2	2.26	Out
Tailings	DOM26-007LR	411.0	333.8	336.0	2.2	2.15	Out
Tailings	DOM26-008	336.0	318.3	326.7	8.4	5.04	Out
			incl
			323.2	326.2	3.0	11.20
Tailings	DOM26-009	691.0	690.0	691.0	1.0	28.9	In Pit
Tailings	DOM26-011	453.0	439.0	440.0	1.0	11.60	Out
			347.0	349.0	2.0	5.13	Out
			379.0	380.0	1.0	22.00	Out
			470.0	474.0	4.0	1.39	In Pit
			493.3	506.5	13.2	1.61	In Pit
Tailings	DOM26-015	687.0	611.0	613.0	2.0	3.04	Out
Tailings	DOM26-016	690.0	51.2	55.0	3.8	1.51	In Pit
			105.2	109.4	4.2	0.90	In Pit
			669.0	671.5	2.5	1.68	Out
Tailings	DOM26-050	559.0	341.0	358.3	17.3	9.09	Out
			incl				Out
			342.7	350.5	7.8	14.76	Out
			400.0	418.0	18.0	3.86	Out
			incl				Out
			400.0	402.6	2.6	15.39	Out
			445.0	448.5	3.5	13.49	Out
			454.0	457.0	3.0	2.48	Out
Preston	DOM26-020	300.0	36.0	39.5	3.5	2.30	Out
Preston	DOM26-020	300.0	262.4	262.8	0.4	69.8	Out
Preston	DOM26-024	465.0	19.0	20.0	1.0	10.8	Out
			38.0	39.0	1.0	14.9	Out
			43.0	47.0	4.0	1.16	Out
			147.1	159.0	11.9	0.79	Out
Preston	DOM26-021	210.0	40.6	53.6	13.0	0.70	Out
Preston	DOM26-021	210.0	187.5	194.8	7.3	1.01	Out
Preston	DOM26-022	462.0	33.5	51.7	18.2	0.62	Out
Preston	DOM26-022	462.0	155.5	159.3	3.8	1.39	In Pit
Preston	DOM26-026	612.0	8.0	15.0	7.0	1.72	In Pit
			162.4	166.5	4.1	3.26	In Pit
			180.0	190.8	10.8	0.76	Out
			225.0	231.0	6.0	0.79	Out
			283.0	285.0	2.0	6.30	Out
			559.3	565.6	6.3	0.79	Out
Preston	DOM26-028	240.0	14.0	19.3	5.3	1.43	In Pit
Preston	DOM26-028	240.0	66.1	70.1	4.0	1.56	In Pit
Preston	DOM26-030	375.0	156.0	168.0	12.0	1.48	In Pit
Preston	DOM26-033	216.0	117.0	129.1	12.1	1.89	Out
Preston	DOM26-034	216.0	64.0	67.0	3.0	7.64	Out
			incl
			66.0	67.0	1.0	21.5
			106.0	123.0	17.0	1.38	Out

All assays are reported uncut.
Intervals are reported using core lengths only as true widths are not known at this time.

Figure 1. Dome Results

TVZ Project

Drilling at the Hoyle Pond Mine included a total of 22 holes totalling 5,238.5 m (including 1 abandoned hole – 261m) from the 1210 level and 1680 level exploration drifts to confirm and expand the TVZ Zone.

TVZ is a significant zone of gold mineralization located between the 800 and 1800 m levels in the southeast portion of the Hoyle Pond Mine (Figures 2 and 3).

Past work at the project includes 437 holes (172,319 m) of wide-spaced drilling from three main platforms on the 900, 1210 and 1410 levels, as well as limited development, mapping, chip sampling and metallurgical test work on the 1210 level. Results from the drilling, mapping and chip sampling have been positive and indicate multiple holes with grades exceeding 5.00 gpt over widths of 5 to 10 m. The results also indicate positive results from the two deepest holes to test the zone to date, holes 21009 and 21094, with returned values of 6.29 gpt over 5.3 m and 4.98 gpt over 4.0 m, respectively, between the 1550 and 1610 levels. As a result, the potential to extend the zone to greater depths is considered excellent.

Results of the past metallurgical work indicate a strong correlation of gold with arsenopyrite and variable recoveries, but with the potential for improvement using enhanced processing.

The current work program is designed to infill and expand the TVZ Zone, with drilling ongoing from the historic drill platforms, in preparation for an initial NI 43-101 mineral resource in late 2026.

Drilling from the 1210 Level includes 19 holes (4,257m) that intersect the target model near the level elevation and extend up to 200 metres above and below it. Selected intervals from these holes have been sampled and submitted to XPS Laboratories in Sudbury, Ontario, for metallurgical testing. Results are expected late 2026.

Significant results from holes drilled near the 1210 level include: 5.13 gpt over 18.2m and 5.15gpt over 12.0m, in hole 27967; 7.04 gpt over 16.9m, in hole 27970; 5.17 gpt over 21.0m, in hole 27971; 5.73 gpt over 23.2m, in hole 27972; 6.93gpt over 11.7m and 4.54 gpt over 22.9m, in hole 27974; 5.65 gpt over 30.5m, including 9.05 gpt over 13.2m, in hole 27976; and 4.40 gpt over 14.0m, in hole 27977. Significant results from holes above the level include: 5.84 gpt over 10.6m, in hole 27889 and 5.13 gpt over 5.3m, in hole 27888 and significant results from below the level include: 5.24 gpt over 12.9m, in hole 27891; 3.45 gpt over 15.0m and 4.59 gpt over 25.0m in hole 27969; 2.73 gpt over 19.9m and 4.54 gpt over 18.4m in hole 27968; 3.06 gpt over 15.1m and 6.80gpt over 8.0m in hole 27894; 4.41 gpt over 13.4m in hole 27890 and 5.46 gpt over 12.5m and 4.43 gpt over 4.4m, in hole 27892 (Table 2 and Figure 3). Review of results indicates good correlation of mineralized zones and grades within the new holes and previously drilled holes with local upsides in grade noted due to unsampled core in older holes.

Drilling from the 1680 level includes 2 holes (720.5 m) to continue testing the lower part of the target model which also obtained very favourable results including: 4.51 gpt over 9.0 m, in hole 27849 and; 4.30 gpt over 24.4m, including 5.73 gpt over 12.4m, in hole 27899. The intercept in hole 27899 is located approximately 130 meters above the 1680 level and 40 meters up plunge of previously released hole 27854 which intersected 5.82 gpt over 9.0m and 4.32 gpt over 19.0m, and the intercepts in hole 27849 are located 50 meters below the 1680 level and 30 meters east of hole 27855 which intersected 3.20 gpt over 6.7m, including 5.78 gpt over 2.5m and 15.60 gpt over 0.3m (see press release dated April 23,2026).

Drilling at TVZ is ongoing with two drill rigs operating from the 1210 level and one drill on the 1410 level. Current drilling on the 1210 level is primarily focused on infilling and extending mineralization proximal to historic drill intercepts, while drilling from the 1410 level continues to test the projected down plunge extension of the TVZ Zone.

Table 2: Intercepts from TVZ Project^1,2,3

Level	Hole ID	Total Hole Depth (m)	From	To	Core length	Au	Notes
Level	Hole ID	Total Hole Depth (m)	(m)	(m)	(m)	(g/t)	Notes
1210L	27967	130.0	1.0	6.0	5.0	6.19	QV/qs/aspy
			45.0	57.0	12.0	5.15	QV/qs/aspy
			75.4	93.6	18.2	5.13	QV/qs/aspy
	27970	127.1	47.0	55.1	8.1	3.62	QV/qs/aspy
			77.4	94.3	16.9	7.04	QV/qs/aspy
			incl
			80.3	86.1	5.8	11.57	QV/qs/aspy
	27971	130.6	19.0	37.2	18.2	1.75	QV/qs/aspy
			50.0	52.7	2.7	4.51	QV/qs/aspy
			73.0	94.0	21.0	5.17	QV/qs/aspy
	27972	135.0	55.0	69.0	14.0	5.39	QV/qs/aspy
			incl
			55.6	61.0	5.4	11.61	QV/qs/aspy
			75.8	99.0	23.2	5.73	QV/qs/aspy
			incl
			86.7	99.0	12.3	8.45	QV/qs/aspy
	27973	130.7	19.0	22.5	3.5	5.24	QV/qs/aspy
			28.9	32.7	3.8	3.73	QV/qs/aspy
			102.1	109.6	7.5	9.01	QV/qs/aspy
	27974	130.0	8.8	17.0	8.2	2.67	QV/qs/aspy
	27974	130.0	73.1	96.0	22.9	4.54	QV/qs/aspy
	27975	127.0	23.0	34.6	11.6	2.75	QV/qs/aspy
			86.5	110.8	24.3	4.24	QV/qs/aspy
			incl
			104.0	109.3	5.3	7.07	QV/qs/aspy
	27976	150.0	18.7	31.0	12.3	2.69	QV/qs/aspy
			105.5	136.0	30.5	5.65	QV/qs/aspy
			incl
			107.8	121.0	13.2	9.05	QV/qs/aspy
	27977	170.0	0.0	6.5	6.5	3.16	QV/qs/aspy
			14.6	22.9	8.3	3.35	QV/qs/aspy
			112.0	126.0	14.0	4.40	QV/qs/aspy
			incl
			117.8	124.6	6.8	7.03	QV/qs/aspy
	27888	342.0	101.7	105.3	3.6	5.13	QV/qs/aspy
			168.5	170.6	2.1	3.29	QV/qs/aspy
			229.9	233.5	3.6	3.35	QV/qs/aspy
	27890	291.0	80.2	81.0	0.8	12.85	QV/qs/aspy
			205.8	214.5	8.7	2.67	QV/qs/aspy
			226.0	229.6	3.6	3.26	QV/qs/aspy
	27891	361.7	37.0	37.6	0.6	9.62	qs/aspy
	27891	361.7	258.0	270.9	12.9	5.24	QV/qs/aspy
	27892	330.0	41.0	42.0	1.0	7.21	qs/aspy
			167.9	172.0	4.1	4.43	QV/qs/aspy
			259.5	272.0	12.5	5.46	QV/qs/aspy
	27893	400.0	319.2	322.7	3.5	2.17	QV/qs/aspy
	27889	291.0	84.5	87.8	3.3	3.53	QV/qs/aspy
			105.0	106.5	1.5	7.20	QV/qs/aspy
			193.0	203.6	10.6	5.84	QV/qs/aspy
	27969	150.0	2.0	4.5	2.5	5.44	QV/qs/aspy
			42.0	57.0	15.0	3.45	QV/qs/aspy
			incl
			43.0	47.6	4.6	5.41	QV/qs/aspy
			and
			51.6	56.4	4.8	4.77	QV/qs/aspy
			89.0	114.0	25.0	4.59	QV/qs/aspy
	27968	150.0	3.3	23.2	19.9	2.73	QV/qs/aspy
			incl
			14.0	23.2	9.2	3.78	QV/qs/aspy
			40.0	45.5	5.5	5.45	QV/qs/aspy
			108.6	127.0	18.4	4.54	QV/qs/aspy
			incl
			112.5	121.5	9.0	7.54	QV/qs/aspy
	27894	400.9	57.3	58.3	1.0	7.53	QV/qs/aspy
174.5			189.6	15.1	3.06	QV/qs/aspy
incl
183.0			186.0	3.0	7.55	QV/qs/aspy
281.0			286.0	5.0	3.52	QV/qs/aspy
328.0			336.0	8.0	6.80	QV/qs/aspy
27980	310.0	37.0	39.0	2.0	2.42	qs/aspy
		204.2	208.0	3.8	3.21	QV/qs/aspy
		217.5	230.9	13.4	4.41	incl 6.9m QV
1680L	27849	370.5	259.3	263.0	3.7	4.31	QV/qs/aspy
	27849	370.5	301.5	310.5	9.0	4.51	QV/qs/aspy
	27899	350.0	259.0	261.4	2.4	4.58	QV/qs/aspy
			321.0	345.4	24.4	4.30	QV/qs/aspy
			incl
			333.0	345.4	12.4	5.73

All assays are reported uncut.
Intervals are reported using core lengths as true widths are not known at this time.
Acronyms stand for: QV = Quartz Vein, VG = Visible Gold, qs = quartz stringers, aspy = arsenopyrite.

Figure 2. TVZ Results (1)

Discovery Mining Ltd.

Figure 3: TVZ Results (2)

Owl Creek

Drilling at the Owl Creek Project included a total of 10 holes (4,216 m) to confirm and expand mineralization near the former Owl Creek open pit (Figure 4). Of the holes drilled, three holes (294 m) were abandoned due to excessive deviation.

The Owl Creek open pit is located approximately 1.5 kilometres west of the Hoyle Pond Ramp Portal and along the south side of the Hoyle Pond belt near the contact between metasedimentary and metavolcanic rocks. The pit, as well as two underground ramps below it, were developed by Falconbridge Gold in the 1980's and were utilized to recover approximately 237,000 ounces of gold at an average grade of 3.75 gpt.

Significant results include: 7.09 gpt over 17.0m, including 23.12 gpt over 3.9, in hole OC26-036B; 6.35gpt over 9.4m, 2.69 gpt over 30.9m, including 9.31 gpt over 2.0m and, 2.86 gpt over 17.4m, in hole OC26-038; 3.41 gpt over 17.0m, including 7.45 gpt over 3.1m;5.96 gpt over 7.0m in hole OC27-042; 5.73 gpt over 4.2m and 2.74 gpt over 30.4m in hole OC26-046; 4.72 gpt over 24.0m, including 12.26 gpt over 6.8m, in hole OC26-040; 4.86 gpt over 8.4m in hole OC26-044; and 19.35 gpt over 5.4m, including 270.0 gpt over 0.3m in hole OC26-045A (Table 3).

Holes OC26-036B, OC26-038, OC26-040, and OC26-042 were drilled to infill previously untested gaps in the eastern portion of the deposit between the 275 m and 375 m levels. Hole OC26-036B was drilled approximately 335 m below previously released hole OC26-029A, while hole OC26-038 was drilled approximately 135 m below OC26-029A. Hole OC26-040 was drilled approximately 200 m below OC26-029A, and hole OC26-042 was drilled approximately 55 m west of OC26-029A (see press release dated April 23, 2026).

Holes OC26-040, OC26-44, OC26-045A and OC26-046 were drilled to infill untested areas below the historic pit surface between the surface and the 175 m level. Relative to previously released hole OC26-029A, hole OC26-044 was collared approximately 125 m up-dip and 150 m to the west, hole OC26-045A was drilled approximately 125 m up-dip and 225 m to the west, and hole OC26-046 was drilled approximately 125 m up-dip and 275 m to the west.

While the review and interpretation of drilling is still in progress, results to date at both Owl Creek and the 750 Zone are very encouraging. As a result, the Company has initiated a new exploration ramp from the Hoyle Pond Mine to Owl Creek to allow more detailed drilling at Owl Creek, as well as exploration drilling between the two areas. The new exploration ramp will start from the existing surface portal for the Hoyle Pond Mine located, just north of the 350 Zone, and is projected to be approximately 1.5 km in length. The expected completion date for the ramp is in Q3 2027.

The current drill program is continuing with two rigs that will focus on infill and extension of mineralization at both the Owl Creek and the 750 zones. Work is also in progress to review potential new drill targets along the Hoyle Pond – Owl Creek Trend, such as the historic 350 Zone, which is located 500 m to the east of the 750 Zone and is partially developed, with a ramp connecting it to the Hoyle Pond Mine near the main ramp portal.

Table 3. Intercepts from New Drilling at the Owl Creek Project^1,2

Hole ID	Total Hole Depth		From	To	Core length	Au
Hole ID	Total Hole Depth		(m)	(m)	(m)	(g/t)
OC26-036B	867		594.8	597.1	2.3	10.60
		including	596.0	596.5	0.5	45.30
			769.0	786.0	17.0	7.09
		including	782.1	786.0	3.9	23.12
			801.1	804.2	3.1	3.20
			822.3	824.1	1.8	4.31
OC26-038	651.0		447.6	457.0	9.4	6.35
		including	448.0	453.6	5.6	9.69
			479.0	482.0	3.0	3.59
			491.0	521.9	30.9	2.69
		including	491.0	492.0	1.0	11.80
		including	497.0	499.0	2.0	9.31
		including	504.0	505.5	1.5	14.64
		including	516.9	518.2	1.3	12.65
			534.3	551.7	17.4	2.86
		including	535.1	535.8	0.7	12.93
		including	546.6	547.2	0.6	14.70
OC26-042	576.0		204.0	205.0	3.0	4.42
		including	204.0	204.4	0.4	24.20
			349.5	366.5	17.0	3.41
		including	361.2	364.3	3.1	7.45
			403.1	410.1	7.0	5.96
		including	408.7	409.7	1.0	28.70
OC26-046	372.0		168.0	170.0	2.0	3.68
			180.7	184.9	4.2	5.73
			243.0	273.4	30.4	2.74
		including	243.0	244.0	1.0	10.40
		including	260.1	263.0	2.9	4.83
		including	270.0	273.4	3.4	7.47
OC26-040	705.0		594.0	618.0	24.0	4.72
OC26-040	705.0	including	610.0	616.8	6.8	12.26
OC26-044	408.0		202.0	210.4	8.4	4.86
OC26-044	408.0	including	203.1	208.0	4.9	6.37
OC26-045A	342.0		157.9	166	8.1	13.19
		including	159.4	159.7	0.3	270.00
		and incl	161	161.7	0.7	18.70
			187.5	188.3	0.8	11.61
			207.0	211.4	4.4	3.43
			219.0	222.0	3.0	3.55
			241.8	244.5	2.7	5.05

All assays are reported uncut.
Intervals are reported using core lengths only as true widths are not known at this time.

Figure 4. Owl Creek Plan View

Discovery Mining Ltd.

QUALIFIED PERSONS

Discovery’s exploration programs at the Porcupine Operations are conducted under the supervision of Eric Kallio, P.Geo., Senior Vice President, Exploration, Kara Byrnes, P.Geo, Vice President, Exploration and Geology – Porcupine and Craig Yuill, P.Geo., Exploration Manager. Mr. Kallio, Ms. Byrnes and Mr. Yuill are “qualified persons” for the purpose of National Instrument 43-101, Standards of Disclosure for Mineral Projects, of the Canadian Securities Administrators, and have reviewed and approved the scientific and technical information in this news release.

Readers are referred to the mineral resource estimate as set out in the Company’s current technical report entitled “Porcupine Complex, Ontario, Canada NI 43-101 Report on Preliminary Assessment” with an effective date of January 13, 2025 (the “Technical Report”), which is available under the Company’s issuer profile on SEDAR+ at www.sedarplus.ca. Statements concerning mineral resource estimates may also be deemed to constitute forward looking information to the extent that they involve estimates of the mineralization that will be encountered if the property is developed. The Technical Report includes the results of a preliminary economic assessment which is preliminary in nature. It includes inferred mineral resources that are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as mineral reserves and there is no certainty that the preliminary economic assessment will be realized.

QA/QC CONTROLS

The Company follows a quality assurance and control (“QA/QC”) program to ensure that sampling and analysis of all exploration work is conducted in accordance with best practices.

At TVZ, core is logged and sampled in a secure facility at the Hoyle Pond mine site and under supervision of Qualified Geologists. The NQ sized drill core is predominantly sawn in half with one half of the core prepared for shipment, the other half of core retained for future assay verification. CRM standards, coarse blank material and duplicates are inserted every 20 samples. Core samples are picked up by Activation Laboratories at the Hoyle Pond facility and tracked via a chain of custody from site to the lab for preparation and assaying.

At Dome, core is logged and sampled in a secure facility at the Dome mine site and under supervision of Qualified Geologists. The NQ sized drill core is predominantly sawn in half with one half of the core prepared for shipment, the other half of core retained for future assay verification. CRM standards, coarse blank material and duplicates are inserted every 20 samples. Core samples are picked up by Activation Laboratories at the Dome Mine core facility and tracked via a chain of custody from site to the lab for preparation and assaying.

At Owl Creek, all new drill core collected by Discovery is logged and sampled in a secure facility at the Hoyle Pond mine site and under supervision of Qualified Geologists. The NQ sized drill core is predominantly sawn in half with one half of the core prepared for shipment, the other half of core retained for future assay verification. CRM standards, coarse blank material and duplicates are inserted every 20 samples. Core samples are picked up by Activation Laboratories at the Hoyle Pond facility and tracked via a chain of custody from site to the lab for preparation and assaying.

Discovery utilizes the accredited external lab Activation Laboratories to manage its core analysis. ActLabs is certified by the Standards Council of Canada which conforms with ASB-RG Mineral Analysis Laboratory for the Accreditation of Mineral Analysis Testing Laboratories and CAN-P-4E ISO/IEC 17025: General Requirements for the Competence of Testing and Calibration Laboratories.

Sample preparation includes crushing drill core up to 80% passing 2 mm, riffle splitting 500 grams and pulverizing to 95% passing 105 µm followed by both scheduled and specifically requested silica sand cleaning. Gold Analysis involves Fire Assay – Atomic Absorption technique from a 50-gram pulp sample with grade ranges between 5 to 10,000 ppb. Samples greater than 10,000 ppb are analyzed with a gravimetric finish. Selected high grade samples are also analyzed using the screen metallics procedure.

ABOUT DISCOVERY

Discovery Mining Ltd. is a growing precious metals company that is creating value for stakeholders through exposure to gold, silver and other critical minerals. Discovery is advancing plans to more than double annual gold production through investment in the Company’s Porcupine assets, which include multiple operations, attractive growth projects and significant exploration upside in one of the world’s most renowned gold camps in and near Timmins, Ontario. The acquisition of the Kidd Operations in June 2026 further increased Discovery’s land position within the camp, provided valuable infrastructure that will support the Company’s growing gold business, and added critical minerals to the Company’s current production profile. Discovery’s silver exposure comes mainly from the 100%-owned Cordero project, one of the world’s largest undeveloped silver deposits, which is located close to infrastructure in a prolific mining belt in Chihuahua State, Mexico.

On Behalf of the Board of Directors,

Tony Makuch, P. Eng
President, CEO & Chairman

For further information contact:
Mark Utting, CFA
SVP Investor Relations
Phone: 416-806-6298
Email: mark.utting@dsvmining.com
Website: www.dsvmining.com

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION

This news release may include forward-looking statements that are subject to inherent risks and uncertainties. All statements within this news release, other than statements of historical fact, are to be considered forward looking. Although Discovery believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results or developments may differ materially from those described in forward-looking statements. Statements include but are not limited to the resource conversion and expansion drilling at Dome, TVZ and Owl Creek, the high-grade mineralization potential from Owl Creek, located within close proximity to Hoyle Pond; the anticipated results and timing associated with the updated exploration program at the Porcupine Complex; the ability to make new discoveries across the broader property; the ability to complete and the anticipated benefits associated from the development of the Dome and TVZ work programs; the timing associated with a new mineral resource update planned in late 2026 and the anticipated benefits thereof; the ability to convert and extend mineral resources; the development of the Porcupine Operations and its attractive economics and significant exploration upside; construction decision and development, the results of the Technical Report and the anticipated capital and operating costs, sustaining costs, net present value, internal rate of return, the method of mining the Porcupine Operations, payback period, process capacity, average annual metal production, average process recoveries, concession renewal, permitting of the assets, anticipated mining and processing methods, feasibility study production schedule and metal production profile, anticipated construction period, anticipated mine life, expected recoveries and grades, anticipated production rates, infrastructure, social and environmental impact studies, the completion of key de-risking items, including the timing of receipt permits, availability of water and power, availability of labour, job creation and other local economic benefits, tax rates and commodity prices that would support development of the Project, and other statements that express management's expectations or estimates of future performance, operational, geological or financial results Information concerning mineral resource/reserve estimates and the economic analysis thereof contained in the results of the feasibility study are also forward-looking statements in that they reflect a prediction of the mineralization that would be encountered, and the results of mining, if a mineral deposit were developed and mined. Forward-looking statements are statements that are not historical facts which address events, results, outcomes or developments that the Company expects to occur. Forward-looking statements are based on the beliefs, estimates and opinions of the Company’s management on the date the statements are made and they involve a number of risks and uncertainties.

Factors that could cause actual results to differ materially from those described in forward-looking statements include the completion of the drill programs and the results thereon, the ability to complete the required drilling on a timely basis and the impact of the completion of such drill programs on the ability for the Company to prepare an updated resource estimate in 2026; fluctuations in market prices, including metal prices, continued availability of capital and financing, and general economic, market access restrictions or tariffs, changes in U.S. laws and policies regarding regulating international trade, including but not limited to changes to or implementation of tariffs, trade restrictions, or responsive measures of foreign and domestic governments, changes to cost and availability of goods and raw materials, along with supply, logistics and transportation constraints, changes in general economic conditions including market volatility due to uncertain trade policies and tariffs, , the actual results of current and future exploration activities; changes to current estimates of mineral reserves and mineral resources; conclusions of economic and geological evaluations; changes in project parameters as plans continue to be refined; the speculative nature of mineral exploration and development; risks in obtaining and maintaining necessary licenses, permits and authorizations for the Company’s development stage and operating assets; the accuracy of historical and forward-looking operational and financial information estimates provided by Newmont; the Company’s ability to integrate the Porcupine Operations; statements regarding the Porcupine Operations, including the results of technical studies and the anticipated capital and operating costs, sustaining costs , internal rate of return, concession or claim renewal, the projected mine life and other attributes of the Porcupine Operations, including net present value, the timing of any environmental assessment processes, reclamation obligations; operations may be exposed to new diseases, epidemics and pandemics, including any ongoing or future effects of COVID-19 (and any related ongoing or future regulatory or government responses) and its impact on the broader market and the trading price of the Company’s shares; provincial and federal orders or mandates (including with respect to mining operations generally or auxiliary businesses or services required for operations) in Canada and Mexico, all of which may affect many aspects of the Company's operations including the ability to transport personnel to and from site, contractor and supply availability and the ability to sell or deliver mined silver; changes in national and local government legislation, controls or regulations; failure to comply with environmental and health and safety laws and regulations; labour and contractor availability (and being able to secure the same on favourable terms); disruptions in the maintenance or provision of required infrastructure and information technology systems; fluctuations in the price of gold or certain other commodities such as, diesel fuel, natural gas, and electricity; operating or technical difficulties in connection with mining or development activities, including geotechnical challenges and changes to production estimates (which assume accuracy of projected ore grade, mining rates, recovery timing and recovery rate estimates and may be impacted by unscheduled maintenance); changes in foreign exchange rates (particularly the Canadian dollar, U.S. dollar and Mexican peso); the impact of inflation; geopolitical conflicts; employee and community relations; the impact of litigation and administrative proceedings (including but not limited to mining reform laws in Mexico) and any interim or final court, arbitral and/or administrative decisions; disruptions affecting operations; availability of and increased costs associated with mining inputs and labour; delays in construction decisions and any development of the Porcupine Operations; changes with respect to the intended method of mining and processing ore from the Porcupine Operations; inherent risks and hazards associated with mining and mineral processing including environmental hazards, industrial accidents, unusual or unexpected formations, pressures and cave-ins; the risk that the Company’s mines may not perform as planned; uncertainty with the Company's ability to secure additional capital to execute its business plans; contests over title to properties; expropriation +or nationalization of property; political or economic developments in Canada and Mexico and other jurisdictions in which the Company may carry on business in the future; increased costs and risks related to the potential impact of climate change; the costs and timing of exploration, construction and development of new deposits; risk of loss due to sabotage, protests and other civil disturbances; the impact of global liquidity and credit availability and the values of assets and liabilities based on projected future cash flows; risks arising from holding derivative instruments; and business opportunities that may be pursued by the Company. There can be no assurances that such statements will prove accurate and, therefore, readers are advised to rely on their own evaluation of such uncertainties. Discovery does not assume any obligation to update any forward-looking statements except as required under applicable laws. The risks and uncertainties that may affect forward-looking statements, or the material factors or assumptions used to develop such forward-looking information, are described under the heading "Risks Factors" in the Company’s Annual Information Form dated February 19, 2026, and the Company’s technical report (the “Technical Report”) entitled “Porcupine Complex, Ontario, Canada NI 43-101 Report on Preliminary Assessment” with an effective date of January 13, 2025, which is available under the Company’s issuer profile on SEDAR+ at www.sedarplus.ca.

Preliminary Economic Assessment Disclaimer: The Technical Report includes the results of a preliminary economic assessment which is preliminary in nature. It includes inferred mineral resources that are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as mineral reserves and there is no certainty that the preliminary economic assessment will be realized. Readers should refer to the full text of the Technical Report related to Mineral Resources and Mineral Reserves estimates as filed on www.sedarplus.ca.

Photos accompanying this announcement are available at
https://www.globenewswire.com/NewsRoom/AttachmentNg/37a1880e-2b61-4900-a510-5c5a5a713088

https://www.globenewswire.com/NewsRoom/AttachmentNg/eecdc397-080f-4b17-a055-14e45ece7409

https://www.globenewswire.com/NewsRoom/AttachmentNg/fae4b700-b1c2-4607-9928-0f3e8e712625

https://www.globenewswire.com/NewsRoom/AttachmentNg/d74fb919-cf23-48a2-9411-43e1574d5b8b

Discovery Reports Positive Drill Results at Key Growth Projects, Resource Estimates for Dome and TVZ on Track for Late 2026